diff options
author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-05-31 03:02:59 +0300 |
---|---|---|
committer | Neil Armstrong <neil.armstrong@linaro.org> | 2023-05-31 12:09:48 +0300 |
commit | 6eb6b6f0a012993070b26dacb5ea1ff5fc233c18 (patch) | |
tree | 2a18ef65fab444ee3c343fbd264ab66153c63090 /drivers/gpu/drm/bridge | |
parent | 99304fd0050314a0c998c28300393ec574998db9 (diff) | |
download | linux-6eb6b6f0a012993070b26dacb5ea1ff5fc233c18.tar.xz |
drm/bridge: display-connector: handle hdmi-pwr supply
On some devices the +5V Power pin of the HDMI connector and/or the ESD
protection logic is powered on by a separate regulator. Instead of
declaring this regulator as always-on, make hdmi-connector support the
additional hdmi-pwr supply.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230531000259.3758235-4-dmitry.baryshkov@linaro.org
Diffstat (limited to 'drivers/gpu/drm/bridge')
-rw-r--r-- | drivers/gpu/drm/bridge/display-connector.c | 55 |
1 files changed, 29 insertions, 26 deletions
diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c index cad3105ab186..f7f436cf96e0 100644 --- a/drivers/gpu/drm/bridge/display-connector.c +++ b/drivers/gpu/drm/bridge/display-connector.c @@ -191,6 +191,18 @@ static irqreturn_t display_connector_hpd_irq(int irq, void *arg) return IRQ_HANDLED; } +static int display_connector_get_supply(struct platform_device *pdev, + struct display_connector *conn, + const char *name) +{ + conn->supply = devm_regulator_get_optional(&pdev->dev, name); + + if (conn->supply == ERR_PTR(-ENODEV)) + conn->supply = NULL; + + return PTR_ERR_OR_ZERO(conn->supply); +} + static int display_connector_probe(struct platform_device *pdev) { struct display_connector *conn; @@ -316,36 +328,15 @@ static int display_connector_probe(struct platform_device *pdev) if (type == DRM_MODE_CONNECTOR_DisplayPort) { int ret; - conn->supply = devm_regulator_get_optional(&pdev->dev, "dp-pwr"); - - if (IS_ERR(conn->supply)) { - ret = PTR_ERR(conn->supply); - - switch (ret) { - case -ENODEV: - conn->supply = NULL; - break; - - case -EPROBE_DEFER: - return -EPROBE_DEFER; - - default: - dev_err(&pdev->dev, "failed to get DP PWR regulator: %d\n", ret); - return ret; - } - } - - if (conn->supply) { - ret = regulator_enable(conn->supply); - if (ret) { - dev_err(&pdev->dev, "failed to enable DP PWR regulator: %d\n", ret); - return ret; - } - } + ret = display_connector_get_supply(pdev, conn, "dp-pwr"); + if (ret < 0) + return dev_err_probe(&pdev->dev, ret, "failed to get DP PWR regulator\n"); } /* enable DDC */ if (type == DRM_MODE_CONNECTOR_HDMIA) { + int ret; + conn->ddc_en = devm_gpiod_get_optional(&pdev->dev, "ddc-en", GPIOD_OUT_HIGH); @@ -353,6 +344,18 @@ static int display_connector_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Couldn't get ddc-en gpio\n"); return PTR_ERR(conn->ddc_en); } + + ret = display_connector_get_supply(pdev, conn, "hdmi-pwr"); + if (ret < 0) + return dev_err_probe(&pdev->dev, ret, "failed to get HDMI +5V Power regulator\n"); + } + + if (conn->supply) { + ret = regulator_enable(conn->supply); + if (ret) { + dev_err(&pdev->dev, "failed to enable PWR regulator: %d\n", ret); + return ret; + } } conn->bridge.funcs = &display_connector_bridge_funcs; |